Ductus agenesis with right atrial connection

This 27 week fetus was seen for maternal bleeding. There was a placenta previa (not illustrated), right renal agnesis, a 9 mm left pyelectasis and ductal agenesis with right atrial connection (see discussion of the forms of ductal agenesis). A moderate amount of cardiomegaly was also present. The baby did well after birth.

9 mm left pyelectasis:

The umbilical vein joining directly the right atrium

A moderate amount of cardiomegaly

The junction in the right atrium of the 2 cava and the umbilical vein.